Fluid intensifier



June 15, 1965 L R 3,188,963

FLUID INTENS IFIER Filed June 4. 1962 s Sheets-Sheet 1 INTENSIFIER A MULATR ACCL JMULATOR D M F ACCU MULATOR I EILE- :L

INVENTOR.

HENRY P. TYLER BY M JW'z A TTORNE Y.

June 15, 1965 H. P. TYLER 3,138,963

FLUID INTENSIFIER Filed June 4, 1962 s Sheets-Sheet 2 INVENTOR.

HENRY P. TYLER. Ma

A TTORNE Y.

June 15, 1965 H. P. TYLER 3,188,953

FLUID INTENSIFIER Filed June 4, 1962 3 Sheets-Sheet 3 Y e 8 U1 e 3 N l x Lu I H e a a i- INVENTOR.

MJW? ATTQRNEY.

HENRY P. TYLER.

. use of power operated components.

United States Patent 3,188,963 FLUID INTENSIFIER Henry P. Tyler, South Bend, Ind., assignor to The Bendix Corporation, South Bend, Ind., a corporation of Delaware Filed June 4, 1962, Ser. No. 199,677 Claims. (Cl. 1032) It is an object of this invention to provide a means to increase the pressure of a fluid with a combined motor pump mechanism.

In many fields such as aircraft, automotive, industrial and space, there is a continuing trend toward an increased Many of these components are or may be fluid operated and as in the case of vehicle power steering and brakes are usually so operated. Although each power device may he provided with an individual power supply system, it is readily apparent that the duplication of motors, pumps and reservoirs or sump tanks represents an undesirable and expensive multiplication of units.

It is therefore a principle object of my invention to eliminate the need for duplication of systems for power operated components. More particularly, one of my principal objects is to incorporate a fluid intensifier which can pump to several systems at varied back pressures from a single pressurized fluid source.

It is also an object of my invention to provide a combined motor pump unit.

Another object is to provide a motor pump unit having a common inlet and separated discharge means.

Still another object is to intake fluid of a certain pressure to operate a pressure actuated means after which the fluid is exhausted to two or more pressurized systems of varied back pressure.

A further object is to increase the pressure of a fluid which is utilized to drive a motor means as said fluid is passed through said motor means.

Other and further objects will appear to those skilled in the art from the following specification describing the drawings in which:

FIGURE 1 is a schematic showing a background embodiment for my invention;

FIGURE 2 is a schematic presentation of another utilization for my invention;

FIGURE 3 is a sectional view showing one form of the combined motor-pump-intensifier according to my invention;

FIGURE 4 is an end view taken along lines 4-4 in FIGURE 3;

FIGURE 5 is a sectional side view of another form which the combined motor-pump-intensifier may take; and

FIGURE 6 is an end View of a port plate which may be applied to the rotor design of FIGURE 5.

In more detail, FIGURE 1 shows a fluid system having a pump 10 receiving fluid from a reservoir 12 and pumping fluid to an intensifier 14 to be further detailed hereinafter. The fluid is divided by the intensifier and delivered to an accumulator 16 and thence to an actuator 18 with a portion of the fluid returning to the reservoir from the intensifier.

In FIGURE 2, the above system is modified by the addition of a second actuator 20 and accumulator 22.

With regard to the intensifier 14 it is shown in more detail by FIGURES 3 and 5 to include a cylindrical rotor 24 having a plurality of bores 26 concentric with the rotor axis. The bores 26 have their centerline on different radii from the rotor axis to form an inner and outer grouping 28 and 30, respectively.

As seen by FIGURES 3 and 4, the inner group 28 of 3,188,963 Patented June 15, I965 bores 26 can be, as shown, smaller so that they may be interposed with the outer group 30 to make a compact rotor assembly. This difference in size also means that the capacity of the bores vary.

Within large and small bores, plungers 32 and 34 are slidably mounted which plungers are provided with spherical heads 36 and drilled, as at 38, to provide a bleed communication through the head and plunger to a shoe 40 for purposes hereinafter detailed.

The rotor is provided with kidney ports 41 for intake, exhaust and pumping of fluid from bores 26.

For enclosing the rotor 24 a casing 42 is provided, which casing is formed at one end with a plurality of ports 78, 82 and 86 and may, according to whether or not it is desirable to return casing pressure to the reservoir 12, have a port 96 in the side thereof. The housing or casing may be closed at the other end by a plate 52. The plate 52 holds an inclined thrust plate 54 about the raised boss 56 such that the thrust plate 54 provides an angled surface engaging the shoes 40. Thus, whenever the shoe position is changed the plungers 32 and 34 are moved into and out of bores 26.

In still another form, I can mount the thrust plate 54 on bearings; whereupon the movement of the plungers would cause it to rotate, it the cylinder block, or rotor, as termed above, 24 were held fixed.

In order to start the unit, the rotor is held flush to a port plate 68 by a spring loaded bearing assembly which is compressed between boss 56 and the rotor 24. The spring loaded bearing assembly is shown in FIGURE 3 to consist of spring 62 compressed, in the assembled position between the boss 56 and the keeper 64, which keeper abuts a bearing 66 press fitted with rotor 24.

The spring bearing assembly also holds the port plate 68 to the port end of casing 42 by the rotor 24 thereon. The port plate, as seen in FIGURES 3 and 4, is provided with a plurality of semicircular ports 70, 71, 72 and 74. The ports '76 and 71 connect drilled passages 76 and 77 leading from an inlet port 73 in casing 42 to the inner and outer groups 28 and 30; whereas the port 72 connects the inner group of cylinders 28 with a drilled passage 80 leading to a high pressure port 82, and the port 74 connects with a drilled passage 84 leading to a low pressure port 86. The valve plate is also cut out, as at 88 to divide the flow from group 36 when the intensifier is to be utilized in a dual actuation system such as shown by FIGURE 2. This cutout is connected with the case cavity, which cavity may be exhausted through the side port 90.

The rotor 24 is bearingly supported within the case cavity by an annular bearing 92.

The main theory of my design is that pressure ratio is inversely proportional to the ratio of displacements. This is, of course, modified by losses and the case pressure, such that:

(P P motor displacement-losses:(P -P Pump displacement The attenuating losses consist only of internal friction, both mechanical and fluid. Leakages, while aflFecting overall efficiency, are not losses which affect pressure directly, as leakage on the intake of fluid simply results in increased flow rate to the unit and leakage on the pumping and exhausting of fluid merely will increase the rotational speed of my unit.

If increased accuracy of my unit is demanded, a pressure compensator may be provided especially where inlet pressures are varying constantly as well as when case presssure varies. Compensation can be accomplished by biasing inlet pressure to produce a constant outlet pressure. For example, the outlet pressure could be sensed by a small valve and biased by placing an adjustable load spring in opposition to pressure movement of the valve such that displacement of the valve would activate a member to posifrictional restriction to starting the'rotorrevolving. In 1 V '10 the intensifier shown in FIGURES 3 and 4, the/port plate 68 ceases to communicate P to the plungers as they approach'top dead center (TDC), and thereafter, the plungers begin to slide back into the bores; From the TDC position to the bottom dead center (BDC) posi- I tion the inner group 28 is ported to the high pressure discharge port 82, and the'outer group to the low' pressu're port 86 and case cavity leading to return port 90 via the I cutout 88.

The ditferential of exhausting pressureallows the motor to continue rotating While pumping 'at a higher pressure than the incoming fluid.

'In the modification presented by FIGURES 5 and 6,

the rotor 24a is supported by a bearing '94 about the shaft projection 96 of the-rotor. In addition,the bores are of the same size and spaced concentrically about the rotor axis such that the inner. bore group 28a has less capacity than the outer bore group 3011 because of plunger 34a-riding lower on thrust plate 54a than plunger 32a. bodiment, by spring 98;between shaft96' and housing abutment 100.

The'rotor is spring} biased, as in the former em By comparing FIGURES 3, 4 and 6 it will be seen that a the inlet 78 feeds the ports 70, 70a and 71, 71a to communicate the aforesaid inlet 78 with both bore groups, and the two outlet ports 72a and 74a separate thebore discharge two ports 82 and 86 :via passages 80 and 84 respectively connected tothe ports 72a and 74a; Thus, the operation of this embodiment is the same as that described for the intensifier shown in FIGURES 3 and 4, I if t and it may be readily appreciated that a similar casing can be provided forthe rotor and thrustplate assembly of FIGURES 5 and 6, as in FIGURE 3., As is Well understood, those skilled in this art may readily suggest variances in the intensifier structure, and

therefore, I do not intend to be limited by the foregoing description. Rather, it is myrintent to be limited only by the scope of the appended claims which'set'forth the true spirit of my invention. a a

I claim: e a r 1. A fluidintensifier for a pressurized fluid system which intensifier includes: f

a' housing; a I I t a rotating member mounted within said housing, said rotating member having a plurality, of inner and outer concentric bores therein; t a plurality of pressure responsive members operativel mounted in said bores; r

a means to control said pressure responsivemembers',

which means is carried by said housing;

a plate mounted to andiwithin said housingywhich plate has an inlet means common'toj all pressure'responsive members and an outlet means that separates 'the discharge of said pressure responsive members in said outer-bores from that of said pressure responsive members in said inner bores.

2. A fluid intensifier including:

a housing; I

a member rotatingly mounted within said housing, which member is provided with a plurality of inner and outer bores;

a plurality of pressure:responsive elements mounted .in said boresg' a means to move said presure responsive elements in said bores upon rotation of said memberin said housing; q I

a means to simultaneously introduce fluid to said inner and outer bores to operate said outer pressure responsive elements which rotate said member wherey by fluidiin said inner bores is highly pressurized; and a means to severally exhaust'fluid from said bores as it is being forced therefrom by'said pressure responsivekelements. 3. In a fluid system having a tensifier comprising: V v. v a

a. housing having a cavitytherein, which cavity is in flow-communication with the reservoir;

a member rotatably: mounted to and within said housing within said cavity, the member having'a plurality 7' of inner and outer, axially oriented, concentric bores v [with pressure, actuated means therein;.and

f a meansmounted to said housing and operatively connected with the bores providing a common fluid intake ptoosaid boresra nd an individual exhaust port 7' system for said bores. v 7

4. In a fluid, systemafltiid intensifier according to claim '3 and further comprising a passageway operatively fluidreservoir a fluid inconnecting a group of saidbores to said cavity when said pressure actuating means is exhausting fluid from said bores. V V a v '7 5. A fluid intensifier for a pressurized fluid system,

which intensifier comprises:

a housing having a cavity therein; a member mounted in said cavity, which member has a plurality of inner :and outer concentric cylinders therein; T v a plurality of pressure responsive members mounted in 7 said cylinders; a mean s'to control said pressure responsive members;

d, l" a a means to control a supply and discharge of a pressurized fluid toand from said cylinders.

References Cited by the Examiner v v f UNITED, STATES IPATENTS 2,452,410,

10/48. Johnson 103-2 X 2,486,079 '10/495' Tucker 10349 2,862,449 12/58 Wyland e 10349 ,940,2 0 6/60 Mylcraine -52 3,054,261 9/62' Maret tefm'; 6051 60 JULIUS E. WEST," Primary Examiner.

EDGAR w. GEOGHEGAN, Examiner. 

1. A FLUID INTENSIFIER FOR A PRESSURIZED FLUID SYSTEM WHICH INTENSIFIER INCLUDES: A HOUSING, A ROTATING MEMBER MOUNTED WITHIN SAID HOUSING, SAID ROTATING MEMBER HAVING A PLURALITY OF INNER AND OUTER CONCENTRIC BORES THEREIN; A PLURALITY OF PRESSURE RESPONSIVE MEMBERS OPERATIVELY MOUNTED IN SAID BORES; A MEANS TO CONTROL SAID PRESSURE RESPONSIVE MEMBERS, WHICH MEANS IS CARRIED BY SAID HOUSING; A PLATE MOUNTED TO AND WITHIN SAID HOUSING, WHICH PLATE HAS AN INLET MEANS COMMON TO ALL PRESSURE RESPONSIVE MEMBERS AND AN OUTLET MEANS THAT SEPARATES 